using System;
using iTextSharp.tool.xml.parser;
using iTextSharp.tool.xml.html;
/*
 * $Id: TagAttributeState.java 105 2011-05-26 10:18:21Z redlab_b $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2014 iText Group NV
 * Authors: Balder Van Camp, Emiel Ackermann, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
namespace iTextSharp.tool.xml.parser.state {

    /**
     * @author redlab_b
     *
     */
    public class TagAttributeState : IState {

        protected XMLParser parser;

        /**
         * @param parser the XMLParser
         */
        public TagAttributeState(XMLParser parser) {
            this.parser = parser;
        }

        /* (non-Javadoc)
         * @see com.itextpdf.tool.xml.parser.State#process(int)
         */
        public virtual void Process(char character) {
            if (character == '/') {
                // self closing tag detected
                parser.SelectState().SelfClosing();
            } else if (character == '=') {
                this.parser.Memory().CurrentAttr(this.parser.BufferToString());
                this.parser.Flush();
                this.parser.SelectState().AttributeValue();
            } else if (HTMLUtils.IsWhiteSpace(character)){
                SetAttribute();
            } else if (character == '>') {
                CheckAttributeWithNoValue();
                this.parser.StartElement();
                this.parser.Flush();
                this.parser.SelectState().InTag();
            } else if (this.parser.Memory().HasCurrentAttribute() && !HTMLUtils.IsWhiteSpace(character)) {
                // assume attribute with no value, example tag <?formServer defaultPDFRenderFormat acrobat8.1dynamic?>
                this.parser.Memory().PutCurrentAttrValue("");
                this.parser.Append(character);
            } else {
                this.parser.Append(character);
            }
        }

        virtual protected void CheckAttributeWithNoValue() {
            if (SetAttribute()) {
                this.parser.Memory().PutCurrentAttrValue("");
            }
        }

        /**
         * @return true if an attribute was set
         *
         */
        virtual protected internal bool SetAttribute() {
            String attr = this.parser.BufferToString();
            if (attr.Length > 0) {
                this.parser.Memory().CurrentAttr(attr);
                this.parser.Flush();
                return true;
            }
            return false;
        }
    }
}
